Walmart offers the Honey-Can-Do 4-Tier Wire Shoe Rack, model no. SHO-01172, for $14. (Amazon has it for the same with free shipping for Prime members.) Opt for in-store pickup to dodge the $5.97 shipping charge. That's the lowest total price we could find by $2, excluding the mention below.

A close price: Home Depot has it for $14.42 with fee in-store pickup.